Home / 20,506.08-28,302.98-13,428.38

Finding the Fourth Proportional to 20,506.08, 28,302.98 and 13,428.38

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Solution

The fourth proportional to 20,506.08, 28,302.98 and 13,428.38 is: 18,534.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.08 : 28,302.98 = 13,428.38 : x
  2. Step 2: Convert to fraction form
    20,506.08/28,302.98 = 13,428.38/x
  3. Step 3: Cross multiply
    20,506.08x = 28,302.98 × 13,428.38
  4. Step 4: Simplify right side
    20,506.08x = 380,063,170.57
  5. Step 5: Solve for x
    x = 380,063,170.57/20,506.08
  6. Step 6: Final answer
    x = 18,534.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.